Periscopic field-glass.



c. F. SMITH.

PERISCOPIC FIELD GLASS. APPLICATION HLED 00%. :2, 1,915. Patented Apr.- .1'1, 1911-6.

2 suszrsi-suen I.

C. F. SMITH.

PERISCOPIC FIELD GLASS.

APPLICATION mm OCT.12,1915.

1,178,545. Patented Apr. 11, 1916.

2 SHEETS-SHEET 2.

CHARLES E. SMITH, or BROOKLYN, new Yonxf' PERISCOPIC FIELD-GLASS.-

Application filed October 12, 1915. Serial No. 55,481.

To all whom it may concern Be it known that I, CHARLES F. Sm'ru, a citizen of the United States, residing at Brooklyn, in the county of Kings. State of New York, have invented certain new and Field-Glasses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The presentinvention; is directed to im} provements in periscopic field glasses, and has for its objectto so construct a deviceof this character that the same can be folded in acompact form when not in use, and readily extended for use.

A further object of the invention is to provide a device of this character so e011- structed that the same can befolded into compact form and inclosed in a casing supported by a conventional form of field glass. With these and other objects in view, this invention residesin the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which .5 Figure 1 is a side elevation of the device @d'hhowing the periscope extended.

Fig. 2 is a front elevation of the same. Fig. 3 is a longitudinal sectional view through the device, showing the same folded. Fig. 4. is a sectional view on line 4-4: of Fig. 1. Fig.

35 5 is a similar view on line 5-5 of Fig. 1.

.l ig. 6 is a sectional view on line G-(; of Flg. 1. Fig. 7 1s a fragn'ientary view of the lower end of one of the bars of the side 140 the device folded.

1.4 comrected door 3.

frames. Fig. 8 is a front elevation, showing Referring to the drawing 1 indicates a conventional form of field glass, which has mounted thereon a casing 2, and associated with-the open end of the casing is a hingedly Slidable in the casing 2 is a frame at, said frame having studs5 carried thereby, and adapted to engage the upwardly projecting end 6 of the track 7,

Wh1Ch 1S mounted in the casing 2, thereby 5o limiting the outward sliding movement of ,55 the frame 4. 1 9 98 the frame. Lazy-tong slide frames 8 are provided, and have their lower ends formed with slots9, which are adapted to slidably Y engage the studs carried by the sides of into the slots 9 are ,tlateral'rslots' 11. Thus-it will .bexseen that:

Specification of Letters Patent.

p since the 'upperends of the framesS are useful Improvements 1n Periscopic' 3 of the drawing. To prevent scratching'of Patented Apr. 11, 1916.

when the studs'lO are engaged in-t-he slots 11, that the side frames 8 will beheld in their extended positions, thereby holding the collapsible tube 12 in its extended position,

connected to the upper end of said tube. The

frame 1 has its sides provided with grooves 4., which are adapted to slidably engage the tongue 7' of the track 7 thereby preventing tilting of the tube 12 when in its extendedposition. 'Hingedly connected with the upper end of the tube 12 is the back of the tube 12. Hingedlyconnected to the lower end of the tube 12 is a plate 18, which supports the mirror 19, said mirror being held in inclined relation to the lens ofthe glass 1 by pivotally connected links 20. The sides of the plate 18 and lower end of the tube 12 are connected by flexible aprons \Vhen it is desired to use the periscope, 1t is only necessary to move the frame 4 from. thecasing 2 and extend the side frames-8,

after which the mirror 14: and mirror 19 are alined so that the object viewed will be reflected from the mirror 14 to the mirror 19,

so that a person using the field glass can make the. proper observation. To fold the periscope-it is only necessary to disconnect the plate 15 from the frame 17,,whereupon the mirror can be folded, as shown in Fig.

the mirror 14, one face of the top plate 15 has secured thereto a sheet of felt .or the like. After the mirror 11 has been properly folded, the side frames 8 are collapsed, and therewith the tube 12, and rest upon the frame 4, which is moved inwardly to conceal the periscope within the casing 2, it being of course understood that the mirro 19 has been folded.

The bottom of the casing 2 has attached thereto a cup-shaped plate 22, which has formed therein a key hole'slot 23 for receiving the head 24 of the clamping bolt 25, said bolt having its lower end connected quickly" removed from-the field glass,

to the cross bar 26 whichengages the chame bers of the field glass, as best shown in Fig. 8. Thus it-will be. seen that the casing can when (ie'si'i'eci. Themirror 14: is eise 811211186; by 2% suitable curtain 27; which, may be secured in any suitabie manner be the m1? :1 cent parts.

What is claimed is: v

L A eriscope attachment for field; glasses comprising a casing adapted he be attached to the field glass, said periecepe comprising a collapsible tube having minmrs hi ngec ily associated with its upper and. lower ends, said. tube when fielded being adapted e0 slide into the casing.

2. A neriseepe attachment for field glasses comprising a casing adapted to be attached t4) the field glass, 2 frame Slidably associeted with the casing, a collapsible periscope tube having reflecting mirrors hingediy associated with its upper'and lower." enis, adapted to slide into the casing when ihe tube is collapsed.

8. A periscope attachment for field glasses compmsmg a casmg' adapt-ed be be securecl to the fielfli glass, s 231137 emgeged in. the aiming a cellepsible periscepe we: having its lower end supported by the frame coilapsible side fmmee for holding fleenbe in its extenoted posiiziom mirrars hingedilv associated with ehe iqxper :mcl lower ends 0f the tube mid mirmrs being adapted 0 1e @fiube is ceilap fid and slide M frame.

A 4-. Ape

t isce ge can 111 a eeiiepsible tube which fold When i v new; fer field'glasses eminprlsltn 2; (32131119: adapted to be detach- ?rh n folded 1s adapted t0 slide im'io the casmg.

inw m ca.

ably (tonne-u ed in the field g1ass,'seici periesmwny whereof, I 2253K my sigma Arm 13: Q1 L151. 

